I live on Bruny Island, off the Southern Coast of Tasmania, and am retired after 30 odd years in private practice - increasingly couples work as the years progressed. I have just been writing (on my blog) about how your 1977 article on  interlocking rackets (couples' conflict) was my first introduction to the construct of cycles of negative interaction and how your model provided a foundation from which my thinking and practice developed over the succeeding years. So I thought I would write and tell you, and say thanks. John Barnaby